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C.1 Matlab Code for Initializing Motor and Finding Peaks
% Load three-phase induction motor parameters
clear;
% Initial conditions
Psiqso = 0.1;
% stator q-axis total flux linkage
Psipqro = 0.1;
% rotor q-axis total flux linkage
Psidso = 0.1;
% stator d-axis total flux linkage
Psipdro = 0.1;
% rotor d-axis total flux linkage
wrbywbo = 0.0;
% pu rotor speed
%Parameters of 50 hp, three-phase induction machine
Sb = 50*746;
% rating in VA
Vrated = 480;
% rated line-to-line voltage in V
P= 4;
% number of poles
frated = 60;
% rated frequency in Hz
Irated = 58;
wb = 2*pi*frated;
% base electrical frequency
we=wb;
wbm = 2*wb/P;
% base mechanical frequency
Zb=Vrated*Vrated/Sb;
%base impedance in ohms
Vm = Vrated*sqrt(2/3);
% magnitude of phase voltage
Vb=Vm;
Tfactor = (3*P)/(4*wb);
% factor for torque expression
%Machine Parameters
rs = 0.1376;
% stator wdg resistance in ohms
xls_0 = 0.11761;
% stator leakage reactance in ohms
xplr_0 = 0.44759;
% rotor leakage reactance in ohms
xm = 19.487;
% stator magnetizing reactance in ohms
rpr_0 = 0.028493;
% referred rotor wdg resistance in ohms
drpr = 0.097547;
dxplr = 0.16003;
dxls = 1.7029e-005;
Dstray = 2.24525e-013;
Ipu = [1 1.14 1.223 1.385 1.78 2.0 2.2 3.0 4.0 5.0];
xls_variable = [0.127 0.127 0.127 0.127 0.1255 0.124 0.1148 0.0985 0.0845
0.0761];
% Inertias
Jm = 0.3889 + 0.07;
% motor inertia + motor coupling
Appendix C
Matlab / Simulink Code
Summary :
% rotor q-axis total flux linkage Psidso = 0.1; % rotor d-axis total flux linkage wrbywbo = 0.0; % stator leakage reactance in ohms xplr_0 = 0.44759; % rotor leakage reactance in ohms xm = 19.487; % referred rotor wdg resistance in ohms drpr = 0.097547;
Tags :
ohms,stator,rotor,0127,motor,linkage,flux,total,reactance,parameters,frequency,base,rated